JP2008097872A - Unshielded twisted pair cable - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an unshielded twisted pair cable improved in a crosstalk attenuation between cables. <P>SOLUTION: This unshielded twisted pair cable is characterized by comprising: twisted pair wires each composed by stranding two solid wires each formed by covering the circumference of a conductor with an insulating material; a crisscross interposer used for suppressing crosstalk between cables by partitioning off the four twisted pair wires from one another for suppressing crosstalk in the cable, extending tips thereof to be branched in a branch-like form, and forming spaces between an external sheath and the twisted pair wires; and the external sheath covering the circumference of the crisscross interposer. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a UTP (unshielded twisted pair) cable capable of 10 Gbps transmission.

  Data transmission speeds in the LAN (local area network) market are 10M (mega = 1 million) bps, 100 Mbps, and 1G (giga = 1 billion) bps. The current mainstream is 100 Mbps, and 1 Gbps in part. Is used. “Bps” is a calculation unit representing a data transmission rate, and indicates how many bits can be transmitted per second.

  Now that 1 Gbps transmission has been realized, development of 10 Gbps transmission is advancing as the next stage, but 10 Gbps transmission using a metal cable is difficult and has been realized using an optical fiber cable.

  For metal cables, in order to reduce crosstalk (noise), the twisting pitches of all pairs are made different, and interpositions are installed between the pairs. If the cable is laid next to it, it will not work. For the crosstalk that occurs between the cables, the distance cannot be secured only by the thickness of the sheath, so the pitch cannot be changed.

  Further, if the cable is provided with a shield such as a plastic tape with an aluminum foil inside the sheath, it is possible to avoid crosstalk outside the sheath, but there is a problem that the price is increased.

As described in Patent Document 1, it is possible to prevent twisting at the time of cable manufacture and to easily fix the twisted core between the partition walls, and to improve the flexibility of the UTP cable interposition and the UTP cable. The invention has also been made public.
JP 2004-362907 A

  However, although the invention described in Patent Document 1 has intervening insertion between the twisted cores, the distance between the jacket and the twisted cores is not secured, and crosstalk between cables is suppressed. 10 Gbps transmission is difficult.

  Accordingly, an object of the present invention is to provide an unshielded twisted pair cable that can improve the crosstalk attenuation characteristic between adjacent cables.

  In order to solve the above-mentioned problems, the present invention provides a twisted pair wire 5 in which two single wires 6 each having a conductor 6a covered with an insulator 6b are twisted together, and four said wires to suppress crosstalk in the cable. A cross 4 between the twisted pair wires 5, 5 a, 5 b, and 5 c, and an inner sheath 3 that can be attached to the modular jack 3 a while holding around the four twisted pair wires 5, 5 a, 5 b, and 5 c, It comprises a concave-convex sheath 2 covering the inner sheath 3 and having a plurality of convex portions 2a formed at regular intervals on the inner peripheral surface, ensuring the distance between the concave-convex sheath 2 and the twisted pair wire 5, A non-shielded twisted pair cable 1 characterized by suppressing crosstalk and being easy to attach a modular jack except for the uneven sheath 2 and a twisted pair in which two single wires 6 each having a conductor 6a covered with an insulator 6b are twisted together Line 5 and case In order to suppress crosstalk in the cable, the cross intervening 4 partitioning between the four twisted pair wires 5, 5a, 5b, and 5c and a spiral around the four twisted pair wires 5, 5a, 5b, and 5c A string 9 wound in a shape and an outer sheath 8 that covers the string 9 and covers the string 9 and suppresses crosstalk between the cables by a gap 2b, and is capable of 10 Gbps transmission. The unshielded twisted pair cable 1a, and the twisted pair wires 5, 5a, 5b, 5c obtained by twisting two single wires 6 covered with the insulator 6b around the conductor 6a, and four wires for suppressing crosstalk in the cable Crossing between the cables by forming a gap 2b by partitioning the ends of the twisted pair wires 5, 5a, 5b, and 5c and branching the tips into branches and fixing the positions of the twisted pair wires 5, 5a, 5b, and 5c. Branch-shaped cross interposition 10 with reduced It consists outer sheath 8 which covers around the branch cross intervening 10, has a structure of the unshielded twisted pair cable 1b, characterized in that possible high-speed transmission.

  Since this invention is the above structure, the following effects are acquired. First, by forming irregularities on the inner side of the outer sheath, the outer sheath can be easily peeled off, and an existing modular plug can be easily attached to the inner sheath, thereby reducing costs.

  In addition, by inserting an inner sheath between the outer sheath and the twisted pair and separating the distance between the twisted pair and the outer sheath, a stable separation distance can be maintained even if the same cable is adjacent, and crosstalk is suppressed. Can do.

  Secondly, the distance between the twisted pair in the cable and the adjacent cable can be maintained by extending and branching the tip of the cruciform interposition to increase the distance between the twisted pair and the outer sheath, thereby reducing crosstalk from the adjacent cable. Can do. Further, by providing a notch at the branch point, the position of the twisted pair can be further fixed, and stable characteristics can be ensured.

  The object of the present invention is to provide an unshielded twisted pair cable capable of high-speed transmission, in order to suppress crosstalk in the cable, and a twisted pair wire formed by twisting two single wires covered with an insulator around the conductor. A cross between the twisted pair wires, an inner sheath that can be attached to a modular jack by holding around the four twisted pair wires, and covers the inner sheath around the inner peripheral surface at regular intervals. An unshielded twisted pair comprising an uneven sheath that forms an air layer by forming a plurality of protrusions and suppresses crosstalk between cables, can be easily attached to a modular jack, and is capable of high-speed transmission Realized by using a cable.

  Below, based on an accompanying drawing, the unshielded twisted pair cable which is the present invention is explained in detail.

  FIG. 1 is a perspective view of a cable that is Embodiment 1 of the unshielded twisted pair cable according to the present invention, and FIG. 2 is a cross-sectional view of the cable that is Embodiment 1 of the unshielded twisted pair cable according to the present invention. FIG. 3 is a perspective view when a modular jack is attached to the cable according to the first embodiment of the unshielded twisted pair cable of the present invention.

  The unshielded twisted pair cable 1 is composed of four twisted pair wires 5, 5a, 5b, 5c, a cross interposition 4, an inner sheath 3, an uneven sheath 2, and the like, and can be easily attached to the modular jack 3a and has a high speed. It is a cable that can be transmitted.

  The twisted pair wires 5, 5a, 5b, and 5c are obtained by twisting two single wires 6 and 7, and the single wire 6 and the single wire 7 are spirally entangled within a range indicated by a dotted line in FIG. The surface is colored blue, orange, green, brown, etc. to distinguish the four pairs.

  The single wire 6 includes a conductor 6a and an insulator 6b, and the conductor 6a is covered with an insulator 6b such as polyethylene. The single wire 7 includes a conductor 7a and an insulator 7b, and the conductor 7a is covered with an insulator 7b such as polyethylene.

  For example, when the color of the twisted pair wire 5 is blue, the insulator 6b of the single wire 6 is a blue line 6c on a white background, and the insulator 7b of the single wire 7 is blue. The same applies to the twisted pair wires 5a, 5b, and 5c.

  The cross 4 is a cross-shaped member that partitions between the twisted pair wires 5, 5a, 5b, and 5c. By securing a certain distance or more between each of the twisted pair wires 5, 5a, 5b, and 5c, crosstalk in the cable can be suppressed.

  The inner sheath 3 is coated around the four twisted pair wires 5, 5 a, 5 b, and 5 c in order to hold down the whole. The positions of the twisted pair wires 5, 5a, 5b, and 5c are stabilized, and the pair can be prevented from being unwound.

  The uneven sheath 2 covers the periphery of the inner sheath 3. On the inner peripheral surface, a plurality of convex portions 2a protrude at regular intervals to form irregularities. The inner sheath 3 is in contact with the convex portion 2a.

  An air layer 2 b is formed in a gap surrounded by the inner peripheral surface of the concavo-convex sheath 2, the one convex portion 2 a, the adjacent convex portion 2 a, and the outer peripheral surface of the inner sheath 3. The distance between the twisted pair wires 5, 5 a, 5 b, and 5 c and another twisted cable and the twisted pair wires of the cable that is bent and approached can be secured, and crosstalk between the cables can be suppressed.

  The uneven sheath 2 can be reduced in weight by mixing a foaming agent into a sponge shape. Moreover, many holes at the time of becoming sponge form become an air layer, and a dielectric constant can be suppressed.

  The diameter of the cable is increased by the uneven sheath 2, but if the uneven sheath 2 is peeled off, the existing modular jack 3 a can be attached to the inner sheath 3, which is efficient.

  The unshielded twisted pair cable 1 has a structure capable of preventing crosstalk within the cable and crosstalk between the cables, and can communicate without any trouble even when the information transmission / reception speed is 10 Gbps.

  FIG. 4 is a cross-sectional view of a cable that is Embodiment 2 of the unshielded twisted pair cable according to the present invention.

  The unshielded twisted pair cable 1a is a cable that includes four twisted pair wires 5, 5a, 5b, 5c, a cross interposition 4, a string 9, an outer sheath 8, and the like and can transmit at 10 Gbps. The twisted pair wires 5, 5 a, 5 b, 5 c and the cross interstitial 4 are the same as those of the unshielded twisted pair cable 1.

  The string 9 is formed by spirally winding two polyethylene strings around the four twisted pairs 5, 5a, 5b, 5c. The positions of the twisted pair wires 5, 5a, 5b, and 5c are stabilized, and the pair can be prevented from being unwound.

  The outer sheath 8 covers the periphery of the string 9. A gap is generated between the wound string 9 and the string 9. The distance between the twisted pair wires 5, 5 a, 5 b, and 5 c and another twisted cable and the twisted pair wires of the cable that is bent and approached can be secured, and crosstalk between the cables can be suppressed.

  The unshielded twisted pair cable 1a also has a structure that can prevent crosstalk within the cable and crosstalk between the cables, and can communicate without any trouble even when the information transmission / reception speed is 10 Gbps.

  FIG. 5 is a cross-sectional view of a cable that is Embodiment 3 of the unshielded twisted pair cable according to the present invention.

  The unshielded twisted pair cable 1b is a cable that includes four twisted pair wires 5, 5a, 5b, 5c, a branch cross 10 and an outer sheath 8, and can transmit at high speed. The twisted pair wires 5, 5a, 5b, 5c and the outer sheath 8 are the same as those of the unshielded twisted pair cable 1a.

  The branch-shaped cross interposition 10 extends the tip of the cross interposition and branches in two oblique directions to form a branch 10a. The branched branches 10a are substantially perpendicular to each other, and the branches 10a sandwiching the twisted pair wires 5, 5a, 5b, and 5c are substantially parallel to each other. By surrounding with the branch 10a, the space | interval of the twisted pair wires 5, 5a, 5b, and 5c and the outer sheath 8 can be spaced apart.

  The distance between the twisted pair wires 5, 5 a, 5 b, 5 c and the outer sheath 8 ensures the distance between the twisted pair wires 5, 5 a, 5 b, 5 c and the twisted pair wires of another cable or a curved and approached cable. And can suppress crosstalk between cables.

  The unshielded twisted pair cable 1b also has a structure that can prevent crosstalk within the cable and crosstalk between the cables, and can communicate without any trouble even when the information transmission / reception speed is 10 Gbps.

  FIG. 6 is a cross-sectional view of a cable that is Embodiment 4 of the unshielded twisted pair cable according to the present invention, and FIG. 7 is a cross-sectional view of the cable that is Embodiment 3 of the unshielded twisted pair cable according to the present invention. It is a perspective view.

  The unshielded twisted pair cable 1c is a cable that includes four twisted pair wires 5, 5a, 5b, 5c, a branch cross 10 and an outer sheath 8, and can transmit at high speed. The twisted pair wires 5, 5a, 5b, 5c and the outer sheath 8 are the same as those of the unshielded twisted pair cable 1a.

  The branch-shaped cross interposition 10 extends the tip of the cross interposition and branches in two oblique directions to form a branch 10a. As for the branch 10a, the protrusion 10b may be protruded from the outer upper portion, and the upper side may be pressed when the twisted pair wires 5, 5a, 5b, and 5c are stored.

  The branched branches 10a are substantially perpendicular to each other, and the branches 10a sandwiching the twisted pair wires 5, 5a, 5b, and 5c are substantially parallel to each other. By surrounding with the branch 10a, the space | interval of the twisted pair wires 5, 5a, 5b, and 5c and the outer sheath 8 can be spaced apart.

  An air layer 2b is generated in the outer gap where the twisted pair wires 5, 5a, 5b, and 5c are pressed by the protrusions 10b. The distance between the twisted pair wires 5, 5 a, 5 b, and 5 c and another twisted cable and the twisted pair wires of the cable that is bent and approached can be secured, and crosstalk between the cables can be suppressed.

  The unshielded twisted pair cable 1c also has a structure that can prevent crosstalk within the cable and crosstalk between the cables, and can communicate without any trouble even when the information transmission / reception speed is 10 Gbps.

  FIG. 8 is a cross-sectional view of a cable that is Embodiment 5 of the unshielded twisted pair cable according to the present invention.

  The unshielded twisted pair cable 1d is a cable that includes four twisted pair wires 5, 5a, 5b, 5c, a fan-shaped cross interposition 11 and an outer sheath 8, and can transmit at high speed. The twisted pair wires 5, 5a, 5b, 5c and the outer sheath 8 are the same as those of the unshielded twisted pair cable 1a.

  The fan-shaped cross intervention 11 extends the tip 11a of the cross intervention and expands the tip 11a into a fan shape. On the fan-shaped side, a protrusion may protrude from the outer upper portion, and the upper side may be pressed when the twisted pair wires 5, 5a, 5b, 5c are stored.

  The angle of the fan shape is substantially a right angle, and the sides of one fan shape and the adjacent fan shape that sandwich the twisted pair wires 5, 5a, 5b, and 5c are substantially parallel to each other. By surrounding with a fan shape, the space | interval of the twisted pair wires 5, 5a, 5b, and 5c and the outer sheath 8 can be spaced apart.

  The distance between the twisted pair wires 5, 5 a, 5 b, 5 c and the outer sheath 8 ensures the distance between the twisted pair wires 5, 5 a, 5 b, 5 c and the twisted pair wires of another cable or a curved and approached cable. And can suppress crosstalk between cables.

  The unshielded twisted pair cable 1d also has a structure that can prevent crosstalk within the cable and crosstalk between the cables, and can communicate without any trouble even when the information transmission / reception speed is 10 Gbps.

  As described above, the unshielded twisted pair cable according to the present invention is formed by forming irregularities on the inner side of the outer sheath and inserting the inner sheath between the outer sheath and the twisted pair to increase the air layer. Even in this case, a stable separation distance can be maintained, and transmission attenuation can be suppressed.

  Further, if the outer sheath is peeled off, an existing modular plug can be attached to the inner sheath, and the cost can be reduced.

  Furthermore, the distance between the twisted pair in the cable and the adjacent cable is increased by extending and branching the distal end of the cross, thereby separating the twisted pair and the sheath, thereby reducing the electrical influence from the adjacent cable.

It is a perspective view of the cable which is Example 1 of the unshielded twisted pair cable which is this invention. It is sectional drawing of the cable which is Example 1 of the unshielded twisted pair cable which is this invention. It is a perspective view at the time of attaching a modular jack to the cable which is Example 1 of the unshielded twisted pair cable which is this invention. It is sectional drawing of the cable which is Example 2 of the unshielded twisted pair cable which is this invention. It is sectional drawing of the cable which is Example 3 of the unshielded twisted pair cable which is this invention. It is sectional drawing of the cable which is Example 4 of the unshielded twisted pair cable which is this invention. It is a cross-sectional perspective view used for the cable which is Example 4 of the unshielded twisted pair cable which is this invention. It is sectional drawing of the cable which is Example 5 of the unshielded twisted pair cable which is this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Unshielded twisted pair cable 1a Unshielded twisted pair cable 1b Unshielded twisted pair cable 1c Unshielded twisted pair cable 1d Unshielded twisted pair cable 2 Uneven type sheath 2a Convex part 2b Air layer 3 Inner sheath 3a Modular jack 4 Cross interstitial 5 Twisted pair wire 5a Twist Pair 5b Twisted pair 5c Twisted pair 6 Single wire 6a Conductor 6b Insulator 6c Line 7 Single wire 7a Conductor 7b Insulator 8 Outer sheath 9 String 10 Branched cross 10a Branch 10b Protrusion 11 Fan-shaped cross 11a Tip

Claims (5)

A twisted pair of two single wires covered with an insulator covered with an insulator, a cross between the four twisted pairs in order to suppress crosstalk in the cable, and the four twisted wires An inner sheath that can be attached to the modular jack holding around the paired wires and a plurality of convex portions are formed at regular intervals on the inner peripheral surface that covers the inner sheath and suppresses crosstalk between cables. Unshielded twisted-pair cable, which is characterized by an uneven sheath and is capable of high-speed transmission. A twisted pair of two single wires covered with an insulator covered with an insulator, a cross between the four twisted pairs in order to suppress crosstalk in the cable, and the four twisted wires It consists of a string wound spirally around a pair of wires and an outer sheath that covers the string and covers the string and suppresses crosstalk between the cables by a gap formed between the strings, and is characterized by high-speed transmission Unshielded twisted pair cable. In order to suppress crosstalk between the four twisted pair wires in order to suppress crosstalk in the cable and the twisted pair wires obtained by twisting two single wires covered with an insulator around the conductor, and to prevent crosstalk between the cables An unshielded twisted-pair cable comprising a branch-shaped cross interposed by branching and branching into a branch and an outer sheath covering the periphery of the branch-shaped cross, and capable of high-speed transmission. In order to suppress crosstalk between the four twisted pair wires in order to suppress crosstalk in the cable and the twisted pair wires obtained by twisting two single wires covered with an insulator around the conductor, and to prevent crosstalk between the cables A non-shielded twisted pair cable characterized by comprising a branch-shaped cross interposition in which a protrusion is provided on a branch that is branched into a branch shape and an outer sheath covering the periphery of the branch-shaped cross interposition so that high-speed transmission is possible. In order to suppress crosstalk between the four twisted pair wires in order to suppress crosstalk in the cable and the twisted pair wires obtained by twisting two single wires covered with an insulator around the conductor, and to prevent crosstalk between the cables A non-shielded twisted pair cable characterized by comprising a fan-shaped cross-intersection extending in a fan shape and an outer sheath covering the periphery of the fan-shaped cross-intersection and capable of high-speed transmission.

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